What the common problems we face for PVC wall panel extrusion process, and how to solve it?

PVC wall panels are a kind of PVC products that have emerged rapidly in recent years. The products have quickly won customers' favor with the advantages of environmental protection, beautiful appearance, moisture resistance, and easy installation. In the process of pvc wallboard extrusion, the common abnormal conditions mainly include: wallboard is not straight, wallboard is uneven, surface is not smooth, density is big, wave pattern, toughness is not good, etc. How should we solve these problems when encounter it?

1.Wallboard is not straight

First of all, check whether the setting mold and the die are aligned. Generally, the wall panel is bent upwards because the setting die is not aligned with the die and the position is high; while the wall panel is bent downward because the setting die appears to low status.

In the case that the shaping die and the die have been aligned, check whether the water cooling tank, traction and saw table are aligned with the shaping model.

After these reasons are eliminated, there may be two other reasons for the indirectness:

①The cooling degree for pvc wallboard products is not enough. Secondly, the temperature after the water cooling tank is still relatively high, and it will be distorted under external force. The specific adjustment method is to increase the cooling water volume of the shaping mold and the water cooling tank or find ways to reduce the cooling temp, If it still fails, then reduce the production speed directly;

②The discharging speeds on both sides are inconsistent, the adjustment method: adjust the temperature on both sides of the mold to the same and observe for half an hour, if there is no change, see which side the discharging speed is slow, increase the temperature of that side by a few degrees, or which side is faster, lower the temperature of that side by a few degrees.

2.Wallboard is uneven

Generally, the unevenness in some part of the wall panel mainly occurs in the vacuum setting section of the setting mold. If the vacuum is not enough, or the cooling water for the shaping mold is not enough, the adjustment method is to increase the amount of cooling water in this part, and increase the vacuum through water sealing to speed up the cooling rate of wallboard products. If this part is still not even when the water reaches the maximum, then remove the shaping mold to clean the vacuum path.

For more, we will continue to write in my next article, thank you for your attention.